锦州国际酒店给排水设计

以锦州国际酒店为例,概述超高层酒店给排水各系统的设计,探讨超高层建筑的给排水设计思路。     

沈阳桃仙国际机场T3航站楼给排水设计

航站楼建筑体量庞大、功能复杂、人员密集,系统类型多样。简要介绍航站楼内给排水设计采用的系统形式、用水量标准、屋面融雪和管道防冻措施以及管线布置。结合沈阳桃仙国际机场T3航站楼工程实例,探讨大空间建筑给排水系统的设计思路。     

Water quality and growth of phytoplankton for the Yellow River estuary reservoirs—The phytoplankton growth potential in reservoirs

In this test,we used phytoplankton assay procedure to carry out determinations of phytoplankton growth potential and limiting nutrients in Gengjing reservoir.The test results revealed that,in Gengying reservoir waters,the phytoplankton growth potential of the autoclaved-filtrates and the filtrates are from 0.2 to 2.1 mg/L and from 0 to 1.0 mg/L,and in waterway waters,those of the autoclaved-filtrates and the filtrates are from 0 to 3.3 mg/L and from 0 to 2.2 mg/L.The phytoplankton growth potential of the autoclaved filtrates is approximately two times higher than those of the filtrates.When phosphorus is adjusted beyond 0.5 mg/L,the growth of the phytoplankton is especially very high.Moreover,the limiting concentration of the phosphorus for the growth of phytoplankton is in the range of 0.025 to 0.05 mg/L;the phytoplankton growth potential of the grit chamber sediment samples is higher than those of the waterway sediment.     

二级BAF工艺处理生活污水的效能

采用缺氧、好氧二级无堵塞BAF工艺,处理某电厂生活污水,对COD的去除率为86.6%,对BOD5的去除率为89.23%,对氨氮的去除率为87.7%,对总氮的去除率为83.8%,对总磷的去除率为48.6%,对植物油的去除率为85.71%。结果表明,工艺运行可靠,处理效果稳定。     

石油污染土壤中细菌群落结构特征

 采用聚合酶链式反应(PCR)技术与变性梯度凝胶电泳(DGGE)技术,解析了石油污染土壤中细菌群落结构特征。结果表明,在总石油烃的含量高于30mg/g(以干土计)的重度污染区域,井距相同的土样中的细菌群落表现出对石油污染胁迫较为一致的响应,某些乳球菌(Lactococcus sp.)和无色细菌(Achromobacter sp.)等细菌相对数量显著增加,可以判断其对石油烃的降解起着重要作用。通过对细菌群落结构的解析,可以为石油污染土壤的微生物修复提供理论依据。